基于悬吊系统材性的大跨悬索桥多因素敏感性分析  

Multi-factor sensitivity analysis of long-span suspension bridge based on material characteristics of suspension system

作　　者：李宁波 周宇 李程 张记涛 王嘉昕 LI Ning-bo;ZHOU Yu;LI Cheng;ZHANG Ji-tao;WANG Jia-xin(College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,Anhui,China;Hunan Expressway Group Co.,Ltd.Changsha410022,Hunan,China)

机构地区：[1]安徽建筑大学土木工程学院,合肥230601 [2]湖南省高速公路集团有限公司,长沙410022

出　　处：《喀什大学学报》2020年第6期47-52,共6页Journal of Kashi University

基　　金：安徽省高等学校自然科学研究一般项目“大跨度桥梁施工过程中受力与变形监测和控制”(KJ2017JD03);安徽省高校省级自然科学研究重点项目“基于影响线熵的乡村中小型梁桥损伤快速评估方法研究”(KJ2019A0746);安徽建筑大学博士启动基金项目“基于影响线多级信息融合的中小跨桥梁损伤识别研究”(2019QDZ08).

摘　　要：为了深入研究大跨悬索桥的静动力特性,以临岳高速岳阳洞庭湖大桥为例,建立了有限元分析模型.选取悬吊系统材性参数,对其进行了静、动力特性多因素敏感性分析.结果表明,主缆线形、主梁二阶对称竖弯频率对材性参数变化较敏感,主缆弹性模量对频率的影响最为显著.In order to study the static and dynamic characteristics of long-span suspension bridges,a finite element analysis model was established for Yueyang Dongting Lake Bridge at Linyue high speed.The Material parameters of the suspension system were selected to analyze the multi-factor sensitivity of static and dynamic characteristics.The results show that the shape of the main cable and the frequency of second-order symmetrical vertical bending frequencies are sensitive to the change of material parameters.The elastic modulus of the main cable has the most significant effect on the frequency.

关 键 词：大跨悬索桥 多因素敏感性 悬吊系统 静、动力特性 有限元分析 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]